Anyone who’s barhopped in Philly for the past two decades undoubtedly knows about this deal. Any college kid, blue collar or budget-conscious person has taken advantage of it. It’s known as “The Special” or “Citywide Special,” which essentially is a fancy euphemism for a shot-and-beer combo. A fun argument has been simmering over the years as to whether this one drink or two. Local blog Billy Penn investigates…